Question about Gears.

June 28th, 2006, 08:33 PM	#1
BraggStang Newbie Join Date: Jun 2006 Posts: 16	Question about Gears. Hello all. Hope everyone is doing fine. I have a question about gears. I had my Local Mustang Tuner throw in some 4:10 Gears, with a Tolerance of 10.5 . At around 90 and above I have a really loud humming noise from the rear end. Is this my Drive shaft? My exhuast? (Flowmaster 40s 2 Chamber) or something else I need to worry about??? Thanks, Bragg __________________ 13.8 @ 99.60 mph

June 28th, 2006, 08:37 PM	#2
mdvaldosta Maintenance Man 2002 Mustang GT 11.47@120.58 Join Date: Aug 2005 Location: Valdosta, GA Posts: 3,943	If it's your exhaust then the humming would be based up RPM, not speed. Not likely the driveshaft, they don't make noise (but they do vibrate). Most likely it's your gears. It's pretty normal for gears to make alittle noise, especially if they were't Ford brand. What brand gears did you get? Is is simply speed based, or does the pitch change based on load (how much gas you give)? Just because the gears make alittle noise doesn't mean they were setup wrong.

June 28th, 2006, 08:41 PM	#3
BraggStang Newbie Join Date: Jun 2006 Posts: 16	It happens at around 90 and above MPH. I have Ford Racing Gears. From 0-89 there is no sound then from 90-145mph it hums really bad based on my speed. I don't know what it is, but it is coming from my rear end (Car)(LOL). I would like to know if this is normal or not because I don't want to mess anything up if I keep driving it this way. And yes you can do 145mph with 4:10s without a problem. __________________ 13.8 @ 99.60 mph

June 28th, 2006, 08:55 PM	#4
AtlanticBlue99 The Nice Guy 1999 Ford Mustang V6 14.79 @ 92.15 Join Date: Aug 2005 Location: UGA Posts: 8,251	On the highway and with my 4.10s, I am at 3000 rpms at 70 mph. At that speed, I get in my powerband and waste fuel, but all I hear with off road exhaust at that speed is insane loudness. I hear no whines, whistles, etc. from the rear. However, I have FRPP T Lok and FRPP 4.10:1 ring and pinions that were re-shimmed 3x for perfection. A whine from gears is usually heard at very low speeds (i.e. 5-10mph) or at very excessive speeds. Do you have the same noise at very low speeds? __________________ ModdedAutos 1999 Mustang V6 I used to list my mods here but stopped when I exceeded 255 characters.

June 28th, 2006, 09:04 PM

BraggStang

Newbie

Join Date: Jun 2006

Posts: 16

Originally Posted by AtlanticBlue99

On the highway and with my 4.10s, I am at 3000 rpms at 70 mph. At that speed, I get in my powerband and waste fuel, but all I hear with off road exhaust at that speed is insane loudness. I hear no whines, whistles, etc. from the rear. However, I have FRPP T Lok and FRPP 4.10:1 ring and pinions that were re-shimmed 3x for perfection. A whine from gears is usually heard at very low speeds (i.e. 5-10mph) or at very excessive speeds. Do you have the same noise at very low speeds?

No Sir, I hear nothing at low speeds. Which is making me think it is the driveshaft or something else. I have no clue. Any help would be great. Thanks,

Bragg

__________________
13.8 @ 99.60 mph

June 29th, 2006, 11:39 AM	#6
Screemin3o2 Enthusiast Join Date: Jun 2006 Location: Knoxville, TN Posts: 616	I have been told by some that a little bit of whining is normal and others that a properly setup rearend will make no noise. I think it is just based on your own opinion. Normally if you don't hear any noise by 40 MPH then you aren't going to hear it after that. __________________ 95 Mustang GT Slow Bolt On Car http://img61.imageshack.us/img61/8386/sig4rx2.jpg www.steelcitystangs.com

June 29th, 2006, 01:03 PM	#7
Twist 2 Go Hardcore Enthusiast Join Date: Aug 2005 Location: Chesapeake, Virginia Posts: 1,716	usually if it's a gear noise, it will do it somewhere else at another speed. My guess would be to repl the driveshaft w/ a FRPP aluminum shaft and the noise will probably go away. __________________ 88 Mustang Coupe 2006 FFW Richmond True Street Runner-Up www.rickscarcare.net http://img146.imageshack.us/img146/2158/ricksadql2.jpg

August 17th, 2006, 01:23 PM	#8
320hpPony? Regular Join Date: May 2006 Location: jacksonville,FL Posts: 188	Ya ever think to check ur level of fear oil?I know it sounds dumb but maybe u got too thin an oil in there and when at high speed the gears cant p/u the oil and lube the gears.Just a thought and dont know if it holds water(gear oil i suppose would be a better terminology) but shit,might as well chek it ne ways huh?My rear end whines in reverse but not at all in any forward gears.I have 4.10's in an 8.8'' rearend __________________ Yeah, its ugly, but hot damn its fast! Got 2 camaro SS's and 1 LT1 vette under mah belt in it!

August 17th, 2006, 03:10 PM

Darrell

Feb 08 ROTM

1990 Mustang LX

9.36@143 mph

Join Date: Jan 2006

Location: Fond du Lac, Wisconsin

Posts: 7,287

Originally Posted by Screemin3o2

I have been told by some that a little bit of whining is normal and others that a properly setup rearend will make no noise. I think it is just based on your own opinion. Normally if you don't hear any noise by 40 MPH then you aren't going to hear it after that.

That is correct, a properly set up rear end will make no noise at all no matter what brand gear set is in it. Somewhere along the lines someone started a rumor that Richmond gears make noise. Eventually it grew into all aftermarket gears make noise. Nothing could be further from the truth.

__________________
Racing in memory of Dave Bandt 11/19/69 - 3/23/08
"he's traded his wheels for wings"

Professor of Natural Aspiration

Thanks to: Artie at Trick Flow, Dave at Team Z Motorsports, Brian at Total Engine Airflow and Harold at Furo Racecraft

August 17th, 2006, 05:55 PM

#10

stang fanatic

Enthusiast

Join Date: May 2006

Location: El Paso, Tx

Posts: 855

repl the driveshaft w/ a FRPP aluminum shaft and the noise will probably go away.

Youre gears are past break-in...tooo late if bad set-up. Iagree to the driveshaft thing...spent 1200 chasing a vibration-turned out to be a bad shaft that was recently 'balanced'.

rear end whines in reverse but not at all in any forward gears.I have 4.10's in an 8.8'' rearend

That sounds more like a trans issue rather than rear gear.

__________________
"The gods too are fond of a joke."

"If I had only known, I would have been a locksmith. "

August 18th, 2006, 03:25 AM	#11
320hpPony? Regular Join Date: May 2006 Location: jacksonville,FL Posts: 188	Fair enuff Fanatic u already know my situation so i dont doubt it's true at all ya already know my tranny is junk! I think ima go and just hammer da shit out of it till it pukes gears out!!!!!!I'd like a TKO ne ways! __________________ Yeah, its ugly, but hot damn its fast! Got 2 camaro SS's and 1 LT1 vette under mah belt in it!

September 28th, 2006, 12:16 PM	#12
Paulownian Newbie Join Date: Sep 2006 Posts: 39	Did you check back with your "Local Mustang Tuner"? What was his, or her, reaction?

Threads Similar to: Question about Gears.
Thread	Thread Starter	Forum	Replies	Last Post
Question about New Gears??	Cantbeatblack	99-04	26	September 23rd, 2007 11:44 PM
4.56 gears question	david_m	2005+	9	July 28th, 2007 12:22 AM
question about gears	thewayshemoves	99-04	7	November 30th, 2006 01:07 PM
Question on gears...	topflitecop21	99-04	20	August 18th, 2006 12:08 AM
About Gears & Cam Question	GTXRacing	5.0 Mustangs	6	May 2nd, 2006 05:17 PM

All times are GMT -4. The time now is 05:08 PM.
Contact Us - Modded Mustangs - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2008, Jelsoft Ent. Ltd. & SEO by vBSEO 3.1.0 ©2007, Crawlability, Inc.